CN212272830U - Ultra-high precision hydrostatic bearing - Google Patents
Ultra-high precision hydrostatic bearing Download PDFInfo
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- CN212272830U CN212272830U CN202021298744.3U CN202021298744U CN212272830U CN 212272830 U CN212272830 U CN 212272830U CN 202021298744 U CN202021298744 U CN 202021298744U CN 212272830 U CN212272830 U CN 212272830U
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Abstract
The utility model relates to an ultra-high precision hydrostatic bearing has the hydrostatic bearing case, be provided with the hydrostatic bearing axle that both ends extend in its outside in the hydrostatic bearing case, the middle section outside of hydrostatic bearing axle is provided with axial thrust device, and axial thrust device left and right sides axial is provided with the alloy cover, transmission afterbody support and transmission clearance support have been cup jointed in proper order from the left hand right side in the position in the hydrostatic bearing axle left end outside, and transmission bearing has been cup jointed to transmission clearance support outside, the drive wheel has been cup jointed to transmission bearing's outside, the periphery of drive wheel is provided with the belt groove, the right-hand member face fixed connection of its left end face and transmission afterbody support. The ultra-high precision hydrostatic bearing has high assembly precision, ensures rigidity and elasticity, further ensures precision when oil temperature rises, has extremely high surface hardness, is not easy to deform, has the characteristics of long service life, high axial pushing precision and difficult abrasion, and has the precision of 0.2u meter and the rotating speed of 1 ten thousand revolutions per minute.
Description
Technical Field
The utility model relates to a hydrostatic bearing field especially relates to an ultra-high precision hydrostatic bearing.
Background
A hydrostatic bearing is one type of sliding bearing, and is a sliding bearing in which a pressure lubricant is forcibly pumped into a minute gap between a bearing and a shaft by a pressure pump. The high-speed rotating device is mainly used in the fields which need to run at low speed and require high bearing capacity, high rotating precision and high rotating speed, such as various heavy machine tools and high-precision machine tools.
At present, a hydrostatic bearing on the market is composed of a bearing box, a bearing shaft, a bearing sleeve and the like, and oil is fed into the bearing sleeve to generate hydrostatic pressure so as to realize bearing movement. The axial thrust-free device of the bearing shaft in the prior art or the bearing shaft is a taper shaft, has a certain effect on axial thrust, but cannot fundamentally solve the problem of axial play. In addition, the static pressure bearing sleeve on the market at present adopts a steel machined part or an iron casting, although the static pressure bearing sleeve has rigidity, the elasticity is lacked, the rotation precision can be changed when the oil temperature is changed, and the static pressure bearing has short relative service life, low precision and low bearing capacity.
Disclosure of Invention
The utility model aims to solve the technical problem that, a precision and bearing capacity height are provided, the super high accuracy hydrostatic bearing of bearing axle axial float problem can be solved simultaneously at all.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a kind of ultra-high precision hydrostatic bearing, have hydrostatic bearing cases, the said hydrostatic bearing case has hydrostatic bearing shafts that both ends extend outside its left and right ends, the middle section outside of the said hydrostatic bearing shaft has axial thrust devices formed integrally with it, the axial thrust device left and right sides have alloy sleeves axially, the said alloy sleeve is fixedly connected in the hydrostatic bearing case, its end lies in the outside of the said hydrostatic bearing case and fixedly connects with hydrostatic bearing case through the bolt; the transmission gap support is in clearance fit with the hydrostatic bearing shaft, the right end of the transmission gap support is sleeved outside the left end of an alloy sleeve on the left side of the hydrostatic bearing shaft, the right end face of the transmission gap support is fixedly connected with the hydrostatic bearing box through a bolt, the transmission bearing is sleeved outside the hydrostatic bearing box, a transmission wheel matched with the transmission bearing is sleeved outside the transmission bearing, a belt groove is formed in the periphery of the transmission wheel, and the left end face of the transmission wheel is fixedly connected with the right end face of the transmission tail support through a bolt.
Preferably, a sealing ring is arranged between the tail end of the alloy sleeve and the matching position of the hydrostatic bearing shaft, and the sealing ring is limited and fixed with a sealing sleeve outside the hydrostatic bearing shaft in a sleeved mode.
Preferably, the center of the end face of the seal sleeve is provided with a seal hole in sleeve fit with the outer contour of the seal ring and a coupling hole in sleeve fit with the outer part of the hydrostatic bearing shaft, and the coupling hole and the seal hole are concentrically arranged and are communicated with each other; the position that the seal cover periphery is close to the end is provided with spacing turn-ups, is provided with the pilot hole of controlling the intercommunication on this spacing turn-ups, the seal cover passes pilot hole fixed connection through the bolt and sheathes in at the alloy.
Preferably, the position of the periphery of the sealing sleeve, which is close to the limiting flanging position, is provided with an annular sealing groove, and a sealing ring matched with the sealing groove is arranged in the sealing groove.
Preferably, an adjusting pad is arranged between the right side surface of the hydrostatic bearing box and the alloy sleeve positioned on the right side of the hydrostatic bearing shaft.
Preferably, the alloy sleeve consists of an outer sleeve and an inner sleeve arranged in the outer sleeve; the end part of the outer sleeve is positioned outside the hydrostatic bearing box and is fixed on the hydrostatic bearing box through a bolt; the inner sleeve is a copper sleeve and is sleeved outside the hydrostatic bearing shaft, the tail end of the inner sleeve extends and stretches towards the outer periphery to be clamped outside the tail end of the outer sleeve, the tail end face of the inner sleeve corresponds to the side face of an axial thrust device on the hydrostatic bearing shaft, an annular static pressure groove is formed in the tail end face of the inner sleeve, and an oil inlet hole communicated with the inner portion of the inner sleeve is formed in the outer peripheral face of the outer portion, located on the outer side of the outer sleeve, of the inner sleeve.
Preferably, the inner sleeve is in clearance fit with the hydrostatic bearing shaft and the axial thrust device.
Preferably, the static pressure bearing box is in sealing connection with the joint of the alloy sleeve and the transmission gap bracket.
Compared with the prior art, the utility model discloses an useful part is: the ultra-high precision hydrostatic bearing has high assembly precision, ensures rigidity and elasticity, further ensures precision when oil temperature rises, has extremely high surface hardness, is not easy to deform, has the characteristics of long service life, high axial pushing precision and difficult abrasion, and has the precision of 0.2u meter and the rotating speed of 1 ten thousand revolutions per minute.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a sectional view of the inner structure of the ultra-high precision hydrostatic bearing of the present invention;
fig. 2 is the utility model discloses seal cover structure cross-sectional view in the ultra-high precision hydrostatic bearing.
In the figure: 1. a hydrostatic bearing shaft; 2. an alloy sleeve; 21. a jacket; 22. an inner sleeve; 23. a feed hole; 24. a static pressure groove; 3. a hydrostatic bearing housing; 4. a transmission gap support; 5. a drive tail support; 6. a driving wheel; 7. a drive bearing; 8. an adjustment pad; 9. a seal ring; 10. sealing sleeves; 101. a shaft connecting hole; 102. sealing the hole; 103. positioning holes; 104. a sealing groove; 11. an axial thrust device; 12. and (5) sealing rings.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
the ultra-high precision hydrostatic bearing shown in fig. 1 comprises a hydrostatic bearing box 3, wherein the hydrostatic bearing box 3 is formed by one-step casting, a hydrostatic bearing shaft 1 with two ends extending out of the left end and the right end is arranged in the hydrostatic bearing box 3, the hydrostatic bearing shaft 1 is formed by high-precision processing of chromium-molybdenum steel and is subjected to nitriding treatment on the surface, so that the surface hardness is extremely high, an axial thrust device 11 integrally formed with the hydrostatic bearing shaft 1 is arranged outside the middle section of the hydrostatic bearing shaft 1, alloy sleeves 2 are axially arranged on the left side and the right side of the axial thrust device 11, the alloy sleeves 2 are fixedly connected in the hydrostatic bearing box 3, and the end parts of the alloy sleeves 2 are positioned outside the hydrostatic bearing box 3 and are fixedly connected with the hydrostatic bearing box 3 through bolts; the transmission tail support 5 and the transmission gap support 4 are sequentially sleeved on the part, extending out of the left end of the hydrostatic bearing box 3, of the hydrostatic bearing shaft 1 from left to right, the transmission tail support 5 is rigidly connected with the hydrostatic bearing shaft 1, the transmission gap support 4 is in gap fit with the hydrostatic bearing shaft 1, the right end of the transmission gap support 4 is sleeved outside the left end of the left alloy sleeve 2 on the hydrostatic bearing shaft 1, the right end face of the transmission gap support 4 is fixedly connected with the hydrostatic bearing box 3 through a bolt, the outer part of the transmission gap support is sleeved with a transmission bearing 7, the outer part of the transmission bearing 7 is sleeved with a transmission wheel 6 matched with the transmission bearing 7, a belt groove is formed in the periphery of the transmission wheel 4, and the left end face of the transmission gap support is fixedly connected with the right end face of the transmission tail support 5.
In order to guarantee the leakproofness between alloy sleeve 2 and the hydrostatic bearing axle 1, prevent that fluid from oozing, be provided with sealing ring 9 between 2 terminal and the cooperation department of hydrostatic bearing axle 1 of alloy sleeve, sealing ring 9 is spacing fixed through cup jointing at its and the outside seal cover 10 of hydrostatic bearing axle 1.
As shown in fig. 2, a seal hole 102 which is in sleeve fit with the outer contour of the seal ring 9 and a coupling hole 101 which is in sleeve fit with the outer contour of the hydrostatic bearing shaft 1 are arranged in the center of the end face of the seal sleeve 10, and the coupling hole 101 and the seal hole 102 are concentrically arranged and are communicated with each other; the position that the periphery of seal cover 10 is close to the end is provided with spacing turn-ups, is provided with pilot hole 103 of controlling the intercommunication on this spacing turn-ups, seal cover 10 passes pilot hole 103 fixed connection on alloy cover 2 through the bolt.
In order to ensure the sealing performance between the sealing sleeve 10 and the alloy sleeve 2, an annular sealing groove 104 is arranged at the position, close to the limiting flanging position, of the periphery of the sealing sleeve 10, and a sealing ring 12 matched with the sealing groove 104 is arranged in the sealing groove 104.
In order to ensure the fitting degree and the sealing property between the hydrostatic bearing box 3 and the alloy sleeve 2 according to the size of the hydrostatic bearing box, an adjusting pad 8 is arranged between the right side surface of the hydrostatic bearing box 3 and the alloy sleeve 2 positioned at the right side on the hydrostatic bearing shaft 1.
In order to ensure the rigidity and elasticity of the alloy sleeve 2 and further ensure the precision when the oil temperature rises, the alloy sleeve 2 consists of an outer sleeve 21 and an inner sleeve 22 arranged in the outer sleeve 21, the inner sleeve 22 is a copper sleeve, and the outer sleeve 21 and the inner sleeve 22 are integrally formed in a way of carrying out secondary centrifugal copper casting on an iron casting; the end part of the outer sleeve 21 is positioned outside the hydrostatic bearing box 3 and is fixed on the hydrostatic bearing box 3 through a bolt; the inner sleeve 22 is sleeved outside the hydrostatic bearing shaft 1, the tail end of the inner sleeve 22 extends and is clamped outside the tail end of the outer sleeve 21 in an opening mode towards the outer periphery, the tail end face of the inner sleeve 22 corresponds to the side face of the axial thrust device 11 on the hydrostatic bearing shaft 1, an annular static pressure groove 24 is formed in the tail end face of the inner sleeve 22, and an oil inlet hole 23 communicated with the inner portion of the inner sleeve 22 is formed in the outer periphery of the portion, located on the outer side of the outer sleeve 21, of the inner sleeve 22.
In order to ensure that oil forms an oil film between the inner sleeve 2 and the hydrostatic bearing shaft 1, the hydrostatic bearing shaft 1 is convenient to rotate and does not interfere with each other, and the inner sleeve 22 is in clearance fit with the hydrostatic bearing shaft 1 and the axial thrust device 11.
In order to prevent oil in the hydrostatic bearing box 3 from seeping out, the hydrostatic bearing box 3 is in sealed connection with the joint of the alloy sleeve 2 and the transmission clearance bracket 4.
The specific working mode is as follows: an oil supply system arranged outside the hydrostatic bearing box 3 penetrates through the hydrostatic bearing box 3 and is connected with an oil inlet hole 23, the oil supply system supplies oil to the space between the inner sleeve 22 and the hydrostatic bearing shaft 1 through the oil inlet hole 23, oil entering the outside of the hydrostatic bearing shaft 1 permeates into a hydrostatic groove 24 through a gap, so that oil films are formed between the inner sleeve 22 and the axial thrust device 11 and between the inner sleeve 22 and the hydrostatic bearing shaft 1, meanwhile, the oil can flow into the hydrostatic bearing box 3 through the gap between the inner sleeve 22 and the axial thrust device 11 and is pumped out through the oil supply system, and the oil films between the hydrostatic bearing shaft 1 and the inner sleeve 22 are sealed through a sealing ring 9 at the same time, so that the oil films are prevented from permeating; when the static pressure bearing device works, an external motor is connected with a belt groove outside a transmission wheel 6 through a belt, the motor drives the transmission wheel 6 to rotate through the belt, the transmission wheel 6 rotates on the outer ring of a transmission bearing 7, the position of a transmission gap support 4 connected with the transmission bearing 7 is fixed, the transmission wheel 6 drives a transmission tail support 5 connected with the transmission wheel to rotate, the transmission tail support 5 drives a static pressure bearing shaft 1 to rotate, the static pressure bearing shaft 1 to operate, axial movement of the static pressure bearing shaft 1 can be effectively achieved through the matching of an axial thrust device 11 and an alloy sleeve 2, friction is avoided between the static pressure bearing shaft 1 and an inner sleeve 22 due to the existence of an oil film, even if the temperature of the oil film rises, the inner sleeve 22 in the alloy sleeve 2 is not prone to deformation due to the rise of the oil temperature due to the elasticity of the texture of the.
The ultra-high precision hydrostatic bearing has high assembly precision, ensures rigidity and elasticity, further ensures precision when oil temperature rises, has extremely high surface hardness, is not easy to deform, has the characteristics of long service life, high axial pushing precision and difficult abrasion, and has the precision of 0.2u meter and the rotating speed of 1 ten thousand revolutions per minute.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides an ultra-high accuracy hydrostatic bearing, has hydrostatic bearing case (3), be provided with both ends in hydrostatic bearing case (3) and extend outside hydrostatic bearing axle (1) in its left and right sides both ends, its characterized in that: an axial thrust device (11) integrally formed with the hydrostatic bearing shaft (1) is arranged outside the middle section of the hydrostatic bearing shaft (1), alloy sleeves (2) are axially arranged on the left side and the right side of the axial thrust device (11), the alloy sleeves (2) are fixedly connected in the hydrostatic bearing box (3), and the end parts of the alloy sleeves are positioned on the outer side of the hydrostatic bearing box (3) and are fixedly connected with the hydrostatic bearing box (3) through bolts; a transmission tail support (5) and a transmission gap support (4) are sequentially sleeved on the part of the hydrostatic bearing shaft (1) extending outside the left end of the hydrostatic bearing box (3) from left to right, the transmission tail support (5) is rigidly connected with the hydrostatic bearing shaft (1), the transmission gap support (4) is in clearance fit with the hydrostatic bearing shaft (1), the right end of the transmission gap support (4) is sleeved outside the left end of the left alloy sleeve (2) on the hydrostatic bearing shaft (1), and the right end surface of the transmission clearance bracket (4) is fixedly connected with the hydrostatic bearing box (3) through a bolt, a transmission bearing (7) is sleeved outside the transmission bearing (7), a transmission wheel (6) matched with the transmission bearing (7) is sleeved outside the transmission bearing, a belt groove is arranged on the periphery of the transmission wheel (6), the left end surface of the transmission tail support is fixedly connected with the right end surface of the transmission tail support (5) through a bolt.
2. The ultra-high precision hydrostatic bearing of claim 1, wherein: a sealing ring (9) is arranged between the matching position of the tail end of the alloy sleeve (2) and the static pressure bearing shaft (1), and the sealing ring (9) is limited and fixed through a sealing sleeve (10) sleeved outside the alloy sleeve and the static pressure bearing shaft (1).
3. The ultra-high precision hydrostatic bearing of claim 2, wherein: a sealing hole (102) in sleeve fit with the outer contour of the sealing ring (9) and a shaft connecting hole (101) in sleeve fit with the outer part of the hydrostatic bearing shaft (1) are formed in the center of the end face of the sealing sleeve (10), and the shaft connecting hole (101) and the sealing hole (102) are concentrically arranged and are communicated with each other; the position that the periphery of the sealing sleeve (10) is close to the tail end is provided with a limiting flange, a left assembling hole and a right assembling hole (103) which are communicated are formed in the limiting flange, and the sealing sleeve (10) penetrates through the assembling holes (103) through bolts to be fixedly connected onto the alloy sleeve (2).
4. The ultra-high precision hydrostatic bearing of claim 3, wherein: the position that the periphery of seal cover (10) is close to spacing turn-ups department is provided with annular seal groove (104), be provided with in seal groove (104) rather than mutually supporting sealing washer (12).
5. The ultra-high precision hydrostatic bearing of claim 1, wherein: and an adjusting pad (8) is arranged between the right side surface of the hydrostatic bearing box (3) and the alloy sleeve (2) on the hydrostatic bearing shaft (1) and positioned on the right side.
6. The ultra-high precision hydrostatic bearing of claim 1, wherein: the alloy sleeve (2) consists of an outer sleeve (21) and an inner sleeve (22) arranged in the outer sleeve (21); the end part of the outer sleeve (21) is positioned outside the hydrostatic bearing box (3) and is fixed on the hydrostatic bearing box (3) through a bolt; the inner sleeve (22) is a copper sleeve and is sleeved outside the hydrostatic bearing shaft (1), the tail end of the inner sleeve (22) extends and is opened towards the outer periphery to be clamped outside the tail end of the outer sleeve (21), the tail end face of the inner sleeve (22) corresponds to the side face of an axial thrust device (11) on the hydrostatic bearing shaft (1), an annular hydrostatic groove (24) is formed in the tail end face of the inner sleeve (22), and an oil inlet hole (23) communicated with the inner portion of the inner sleeve (22) is formed in the outer periphery of the portion, located outside the outer sleeve (21), of the inner sleeve (22).
7. The ultra-high precision hydrostatic bearing of claim 6, wherein: the inner sleeve (22) is in clearance fit with the hydrostatic bearing shaft (1) and the axial thrust device (11).
8. The ultra-high precision hydrostatic bearing of claim 6, wherein: the static pressure bearing box (3) is in sealing connection with the joint of the alloy sleeve (2) and the transmission gap support (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021298744.3U CN212272830U (en) | 2020-07-06 | 2020-07-06 | Ultra-high precision hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021298744.3U CN212272830U (en) | 2020-07-06 | 2020-07-06 | Ultra-high precision hydrostatic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212272830U true CN212272830U (en) | 2021-01-01 |
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ID=73898406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021298744.3U Withdrawn - After Issue CN212272830U (en) | 2020-07-06 | 2020-07-06 | Ultra-high precision hydrostatic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212272830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623038A (en) * | 2020-07-06 | 2020-09-04 | 德本恒嘉精机(昆山)有限公司 | Ultrahigh-precision hydrostatic bearing |
-
2020
- 2020-07-06 CN CN202021298744.3U patent/CN212272830U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623038A (en) * | 2020-07-06 | 2020-09-04 | 德本恒嘉精机(昆山)有限公司 | Ultrahigh-precision hydrostatic bearing |
| CN111623038B (en) * | 2020-07-06 | 2023-08-29 | 德本恒嘉精机(昆山)有限公司 | Ultra-high precision hydrostatic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210101 Effective date of abandoning: 20230829 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210101 Effective date of abandoning: 20230829 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |